Hi Menglong,
1. The memory type should not have any impact here.
2. I suspect you are running in atomic mode, and thus the DRAM timing model
is never used.
Hope that helps.
Andreas
From: Menglong Guan via gem5-users
<gem5-users@gem5.org<mailto:gem5-users@gem5.org>>
Reply-To: Menglong Guan
<menglong.g...@uconn.edu<mailto:menglong.g...@uconn.edu>>, gem5 users mailing
list <gem5-users@gem5.org<mailto:gem5-users@gem5.org>>
Date: Wednesday, 21 May 2014 17:06
To: "m5-us...@m5sim.org<mailto:m5-us...@m5sim.org>"
<m5-us...@m5sim.org<mailto:m5-us...@m5sim.org>>
Subject: [gem5-users] Problem about gem5 with DRAMSim2
Dear All,
I am new to gem5, and now runing DRAMSim2 which provided in “ext/dramsim2” as
the mem-type in se mode. There are 2 problems confused me a lot.
The commend line as below
./build/X86/gem5.opt -d output/ ./configs/example/se.py -n 4 --caches --l2cache
--l2_size=1MB --mem-size=4096MB -I 100000000 --mem-type=dramsim2
1. 1. When I change the number of cpu into 4, the results of cpu 1,2,3 in
stats.txt are all 0. There is only cpu0 has results. Does this mean the
mem-type of DRAMSim2 can only applied to one cpu? Or I need to change some
config in some python file to connect DRAMSim2 to cpu 1,2,3?
2. 2. As I changed device parameters, like “refresh period” “tRFC”, in
/gem5/ext/dramsim2/DRAMSim2/ini/ .ini file, only “host_inst_rate, host_op_rate,
host_tick_rate, host_mem_usage, host_seconds” changed. By my understanding,
these results not reflect the performance of my system or memory model.
However, as the refresh period or tRFC changed the performance should changed a
lot. Is this mean I didn't well connect DRAMSim2 with gem5 system?
Thanks,
Menglong
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